Key-fastener



L. JOHNSON. Key-Fastener.

No. 224,919. Patented Feb. 24, 1880;

N-FEFERS. PHOTO-LITMOGRAFMER, WAQIINGTON, D C- 'it consists in the I UNITED STATES PATENT OFFICE.

LENSON JOHNSON, on vINoENNEs, INDIANA.

KEY-FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 224,919, dated February 24, 1880. Application filed January 7, 1880.

To all whom it mag concern:

Be it known that I, LENSON JOHNsoN, of Vincennes, in the county of Knox and State of Indiana, have invented certain new and usei'ul Improvements in Anti-Burglar Key-Fasteners; and I do hereby declare that the following is a full, clear, and exact description thereof, referencebeing bath to the accompanying drawing, and to the letters of reference marked thereon, wlnch form a part of this specification, in which the figure is a perspective view of a portion of a door showing my invention attached.

The object of my invention is to prevent looks from being hurglarized; and to this end combination of a key havi ig a jointed shank with a suitable device for lockin g the same, substantially as herein shown and described.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation.

Arepresents thekey, havingits shank hinged orjointed, as shown at a, nearthe face of the door 1*. The outer end of this shank is provided with a small pin or projection, c.

B is the door, provided at the proper point with a curved metal plate, 0, having a series of holes, (Z d, as shown. This plate 0 is curved and secured to the door concentric with the key-shank A, whose outer end is turned back against the door, and the pin or projection o enters one of the openings (1 and prevents the turning of the key from the outside by for 5 out in the least departing from the spirit of my invention. I do not therefore confine myself tO the exact method herein described for holding or locking the outer end of the keyshank.

The device is cheap, simple, neat in appearance. and efiectually accomplishes the object in view.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is j The jointed key A, having its outer end pro vided with a pin or projection, 0, in combination with metal plate 0, having holes or Opcnings d, all substantially as and for the. purpose set forth.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

LEN SON JOHNSON. Witnesses W. G. MOARTHUR, JOHN K. (Lisa. 

